PUSCH Transform-precoder Dynamic Waveform Switching
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Solution Overview
Problem
Current communication systems face challenges in flexibly switching uplink waveforms, which limits the improvement of physical uplink shared channel (PUSCH) coverage, especially in scenarios with varying coverage conditions.
Innovation Solution
The method involves a terminal device and network device exchanging information to dynamically determine the transform-precoder enabling state of the PUSCH, allowing for flexible switching between different uplink waveforms based on received signal quality and other measurement criteria, thereby enhancing coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed UL waveform selection method is used, then device complexity is reduced, but adaptability to different coverage scenarios deteriorates
Solution Approach 1:
The patent implements dynamic waveform switching by enabling the terminal to select between DFT-S-OFDM and CP-OFDM waveforms based on real-time channel conditions and coverage requirements. The network device configures multiple waveform options and the terminal dynamically switches between them according to measured signal quality metrics, transforming a static waveform selection into a dynamic adaptive process that resolves the contradiction between adaptability and complexity.
Solution Approach 2:
The patent changes the operational parameters of the uplink transmission by adjusting the waveform type (DFT-S-OFDM vs. CP-OFDM) based on coverage scenario parameters. The terminal device monitors channel quality indicators and modifies the waveform parameter accordingly, enabling adaptation to different coverage conditions without requiring complete system redesign, thus balancing adaptability with manageable complexity.
2Reliability
If DFT-S-OFDM waveform is used, then coverage is improved due to low PAPR, but scheduling flexibility deteriorates
Solution Approach 1:
The patent makes the uplink transmission system universal by supporting both DFT-S-OFDM and CP-OFDM waveforms within the same terminal device and network configuration. The terminal can select DFT-S-OFDM for coverage-limited scenarios benefiting from its low PAPR characteristics, while switching to CP-OFDM for scenarios requiring flexible data scheduling. This multi-functionality resolves the contradiction by allowing each waveform to be used where it excels.
Solution Approach 2:
The patent introduces dynamic waveform selection where the terminal device monitors channel conditions and automatically switches between DFT-S-OFDM and CP-OFDM based on real-time requirements. When coverage is the primary concern, DFT-S-OFDM is selected; when scheduling flexibility is needed, CP-OFDM is chosen. This dynamic adaptation resolves the static trade-off between coverage and flexibility.
3Adaptability or versatility
If CP-OFDM waveform is used, then scheduling flexibility is improved, but coverage deteriorates due to high PAPR
Solution Approach 1:
The patent implements dynamic waveform switching that allows the terminal to transition between CP-OFDM and DFT-S-OFDM based on real-time channel conditions. When the terminal detects poor channel quality or coverage limitations, it switches from CP-OFDM to DFT-S-OFDM to benefit from the lower PAPR and improved coverage, while maintaining scheduling flexibility through the network-configured waveform options.
Solution Approach 2:
The patent modifies the transmission parameter by changing the waveform type from CP-OFDM to DFT-S-OFDM when coverage becomes limiting. The terminal device monitors signal quality metrics and adjusts the waveform parameter accordingly, enabling the system to maintain scheduling flexibility while improving coverage when needed by selecting the appropriate waveform for the current channel conditions.
Data Source
AI summary
A method for information processing and a terminal device is provided. The method includes the following. A terminal device receives first information from a network device. The first information is used for determining a transform-precoder enabling state of a physical uplink shared channel (PUSCH).